[pre-commit.ci] pre-commit autoupdate (#149)

<!--pre-commit.ci start-->
updates:
- [github.com/pre-commit/mirrors-clang-format: v20.1.8 →
v21.1.0](pre-commit/mirrors-clang-format@v20.1.8...v21.1.0)
<!--pre-commit.ci end-->

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -4,6 +4,6 @@ repos:
     hooks:
     -   id: shellcheck
 -   repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v20.1.8
+    rev: v21.1.0
     hooks:
     -   id: clang-format